PIC18F4439T-E/PT - 8-bit MCU 12KB Flash 40MHz TQFP-44 | Microchip
MPN: PIC18F4439T-E/PT ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $7.85 | $7.85 |
| 10 | $7.1 | $71.00 |
| 100 | $6.3 | $630.00 |
| 500 | $5.65 | $2,825.00 |
| 1,000 | $5.05 | $5,050.00 |
PIC18F4439T-E/PT Overview
Key features include 12 KB Flash program memory, 336 bytes of general-purpose RAM, a 10-bit Analog-to-Digital converter with multiple channels, and an integrated Power Control PWM module tailored for variable-speed motor drive topologies. The wide 4.2V to 5.5V supply range, automotive-grade -40C to +125C operating temperature, and 40 MHz maximum clock rate make it suitable for harsh industrial and automotive environments. The TQFP-44 (PT) surface-mount package supports compact PCB layouts while providing ample I/O for motor control loops and sensing.
The PIC18F4439T-E/PT utilizes Microchip's enhanced PIC18 RISC architecture with a modified Harvard memory layout. This architecture includes hardware multiply, single-cycle access to RAM, and a deterministic interrupt structure, simplifying real-time motor control firmware development. The on-chip PWM module with dedicated time base, dead-band control, and fault inputs is purpose-built for single-phase induction motor (SPIM) commutation, replacing external analog control loops with deterministic firmware execution.
Typical applications include single-phase induction motor controllers, variable-speed fan drives, compressor control boards, white-goods appliance motor drives, and industrial pump controllers. The automotive-grade (-E) temperature range and PWM-on-the-fly features also suit EV auxiliary pumps and HVAC blower modules. Combined with the nanoWatt sleep modes, the part fits battery-backed and energy-efficient appliance platforms.
When designing with the PIC18F4439T-E/PT, ensure external crystal or resonator selection matches the chosen PLL configuration and that the PWM fault inputs are properly bonded to protect the gate drivers. The enhanced Flash supports in-circuit serial programming (ICSP) via two dedicated pins, so allocate a programming header footprint even on production boards to enable field firmware updates.
Drop-in alternatives for PIC18F4439T-E/PT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with PIC18F4439T-E/PT (same form factor and footprint) — differing in Package, Operating Temperature, ADC, Communication, Core Architecture.
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View Datasheet →PIC18F4439T-E/PT Maximum Ratings & Electrical Characteristics
| Architecture | 8-bit PIC18 enhanced RISC (Harvard) |
| Program Memory | 12 KB Flash |
| RAM | 336 bytes |
| Data EEPROM | 256 bytes |
| CPU Clock Speed | 40 MHz maximum |
| Supply Voltage (VDD) | 4.2 V to 5.5 V |
| I/O Pins | 36 |
| A/D Converter | 10-bit, up to 8 channels |
| PWM Module | Power Control PWM with dead-band and fault inputs |
| Motor Control Kernel | Single-Phase Induction Motor (SPIM) Control |
| Operating Temperature | -40 C to +125 C (Automotive -E grade) |
| Package | TQFP-44 (PT) 10x10 mm |
| Mounting Type | Surface Mount |
| Terminal Form | GULL WING |
| ICSP Programming | Yes (In-Circuit Serial Programming) |
PIC18F4439T-E/PT Pin Configuration
| Pin 1 | RC0/T1OSO/T1CKI — I/O port C0 / Timer1 oscillator output / Timer1 clock input |
| Pin 2 | RC1/T1OSI/CCP2 — I/O port C1 / Timer1 oscillator input / CCP2 output |
| Pin 3 | RC2/CCP1 — I/O port C2 / CCP1 PWM output |
| Pin 4 | RC3 — I/O port C3 |
| Pin 5 | RC4 — I/O port C4 |
| Pin 6 | RC5 — I/O port C5 |
| Pin 7 | RC6/TX — I/O port C6 / USART TX |
| Pin 8 | RC7/RX — I/O port C7 / USART RX |
| Pin 9 | RD0/PSP0 — I/O port D0 / Parallel Slave Port data bit 0 |
| Pin 10 | RD1/PSP1 — I/O port D1 / Parallel Slave Port data bit 1 |
| Pin 11 | RD2/PSP2 — I/O port D2 / Parallel Slave Port data bit 2 |
| Pin 12 | RD3/PSP3 — I/O port D3 / Parallel Slave Port data bit 3 |
| Pin 13 | RC4/PSP4 — [DATA_NEEDED: pin 13 name/function] |
| Pin 14 | VDD — Positive supply voltage (4.2V to 5.5V) |
| Pin 15 | VSS — Ground reference |
| Pin 16 | OSC1/CLKIN — Crystal oscillator input / external clock input |
| Pin 17 | OSC2/CLKOUT — Crystal oscillator output / clock output |
| Pin 18 | RA0/AN0 — I/O port A0 / Analog input channel 0 |
| Pin 19 | RA1/AN1 — I/O port A1 / Analog input channel 1 |
| Pin 20 | RA2/AN2 — I/O port A2 / Analog input channel 2 |
| Pin 21 | RA3/AN3/VREF+ — I/O port A3 / Analog input channel 3 / A/D VREF+ |
| Pin 22 | RA4/T0CKI — I/O port A4 / Timer0 clock input |
| Pin 23 | RA5/AN4/SS — I/O port A5 / Analog input channel 4 / SPI slave select |
| Pin 24 | RB0/INT0 — I/O port B0 / External interrupt 0 |
| Pin 25 | RB1/INT1 — I/O port B1 / External interrupt 1 |
| Pin 26 | RB2/INT2 — I/O port B2 / External interrupt 2 |
| Pin 27 | RB3/CCP2 — I/O port B3 / CCP2 output |
| Pin 28 | RB4 — I/O port B4 |
| Pin 29 | RB5/PGM — I/O port B5 / ICSP programming |
| Pin 30 | RB6/PGC — I/O port B6 / ICSP clock |
| Pin 31 | RB7/PGD — I/O port B7 / ICSP data |
| Pin 32 | RE0/RD — I/O port E0 / Read control for PSP |
| Pin 33 | RE1/WR — I/O port E1 / Write control for PSP |
| Pin 34 | RE2/CS — I/O port E2 / Chip select for PSP |
| Pin 35 | AVDD — Analog positive supply |
| Pin 36 | AVSS — Analog ground |
| Pin 37 | RD4/PSP4/FLTA — I/O port D4 / PSP data / PWM Fault A input |
| Pin 38 | RD5/PSP5 — I/O port D5 / PSP data |
| Pin 39 | RD6/PSP6 — I/O port D6 / PSP data |
| Pin 40 | RD7/PSP7 — I/O port D7 / PSP data |
| Pin 41 | PWM1 — Power Control PWM output 1 |
| Pin 42 | PWM2 — Power Control PWM output 2 |
| Pin 43 | PWM3 — Power Control PWM output 3 |
| Pin 44 | PWM4/FLTB — Power Control PWM output 4 / PWM Fault B input |
Typical Applications
PIC18F4439T-E/PT is suitable for 7 applications: Single-Phase Induction Motor Drive, Variable-Speed Fan Controller, Compressor Control Board, Industrial Pump Controller, Appliance Motor Drive, EV Auxiliary Pump Control, HVAC Blower Module.
Single-Phase Induction Motor Drive
The PIC18F4439T-E/PT is purpose-built for single-phase induction motor (SPIM) variable-speed drives. Its 10 MIPS CPU clock and integrated Power Control PWM module with dead-band generators handle Triac and IGBT commutation in ceiling fans, exhaust blowers, and refrigerator compressors. The 10-bit A/D converter reads back-EMF, current sense, and AC line zero-cross signals in real time, while the automotive -40C to +125C temperature grade supports under-hood and outdoor installations. Pair the part with a Microchip MCP8024 or MCP8026 gate driver for a complete 5V single-phase motor control board. The 12 KB Flash comfortably holds a state-machine-based SPIM control loop with fault handling.
Recommended
Variable-Speed Fan Controller
For variable-speed fan controllers in HVAC blowers and white-goods appliances, the PIC18F4439T-E/PT provides deterministic PWM-on-the-fly frequency updates without CPU cycle stealing. The Power Control PWM's fault input can be bonded directly to a hardware overcurrent comparator for sub-microsecond shutdown, protecting the IGBTs in case of stalled-rotor conditions. The nanoWatt sleep modes drop quiescent current below 1 uA in standby, enabling energy-rated appliance compliance. With 36 I/O, the MCU also handles keypad input, RPM feedback via a Hall-effect sensor, and UART diagnostics on the same PCB.
Recommended
Compressor Control Board
The PIC18F4439T-E/PT's automotive-grade temperature range and 5V-only supply make it well-suited to hermetic compressor control boards in refrigerators and air-conditioner outdoor units. The integrated 10-bit A/D measures motor current, discharge temperature, and suction pressure, while the PWM drives the compressor start relay and inverter stage. In-system programming via ICSP allows firmware updates without disassembly, and the 12 KB Flash stores compressor-specific control curves and protection thresholds. The deterministic interrupt latency of the PIC18 architecture keeps the 50/60 Hz line-zero-cross handling tight even under heavy PWM loading.
Recommended
Industrial Pump Controller
For small industrial pump controllers, the PIC18F4439T-E/PT integrates motor control, sensor reads, and HMI driving on a single 5V MCU. Its 40 MHz clock supports closed-loop PID updates at sub-millisecond rates, controlling pressure or flow with high accuracy. The 256-byte EEPROM stores calibration coefficients and runtime counters without external memory. The 36 I/O pins drive a 4-digit 7-segment display, accept 4-20 mA sensor inputs through the A/D, and switch solid-state relays for triac-controlled pumps. The PIC18F4439-E/ML QFN-44 variant is recommended where space-constrained PCB layouts are required.
Recommended
Appliance Motor Drive
Washing machine drain pumps, dishwasher wash pumps, and range-hood blowers all benefit from the PIC18F4439T-E/PT's single-phase motor firmware primitives. The Power Control PWM module drives Triac phase-control or IGBT chopper stages with built-in dead-band, eliminating external timing circuitry. The 12 KB Flash holds fault logs, water-level sensor debounce tables, and Triac zero-cross timing routines, while the on-chip 10-bit A/D reads load current for stall detection. The -40C to +125C temperature range supports both indoor and outdoor appliance platforms.
Recommended
EV Auxiliary Pump Control
Electric vehicle auxiliary water pumps and coolant circulation pumps are ideal applications for the PIC18F4439T-E/PT, which combines automotive-grade temperature operation with LIN/CAN-friendly peripherals. The Power Control PWM module drives the brushless DC water-pump MOSFET stage with dead-band protection, while the 10-bit A/D reads motor current, coolant temperature, and supply voltage. The 12 KB Flash stores pump curves, fault history, and LIN slave communication firmware. Automotive -40C to +125C operation, combined with a TQFP-44 surface-mount footprint, suits underhood ECU enclosures.
Recommended
HVAC Blower Module
HVAC blower modules for automotive climate control rely on the PIC18F4439T-E/PT's automotive-grade operating range and dedicated single-phase induction motor firmware primitives. The PWM module drives a TRIAC or IGBT chopper with deterministic dead-band, while the on-chip 10-bit A/D closes the loop on duct pressure and blower speed feedback. The ICSP programming pins allow firmware calibration at the end of the production line for each blower model. The TQFP-44 footprint and 36 I/O give PCB designers room for CAN/LIN transceivers, EEPROM storage, and NTC temperature sensor inputs.
Recommended
Recommended Products Summary
Engineering reference data for PIC18F4439T-E/PT — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | PIC18F4439-I/PT | PIC18F4439-E/PT | PIC18F4439-E/ML | PIC18F4431-I/PT | PIC18F4420-E/PT | PIC18F442-I/P |
|---|---|---|---|---|---|---|---|
| Package | TQFP-44 (PT) | TQFP-44 (PT) - same | TQFP-44 (PT) - same | QFN-44 (ML) - same pin count, different body | TQFP-44 (PT) - same | TQFP-44 (PT) - same | DIP-40 - different pin count |
| Brand | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology | Microchip Technology |
| Architecture | PIC18 8-bit RISC | PIC18 8-bit RISC | PIC18 8-bit RISC | PIC18 8-bit RISC | PIC18 8-bit RISC | PIC18 8-bit RISC | PIC18 8-bit RISC |
| Flash Program Memory | 12 KB | 12 KB | 12 KB | 12 KB | 12 KB | 16 KB (+33%) | 16 KB (+33%) |
| RAM | 336 bytes | 336 bytes | 336 bytes | 336 bytes | 336 bytes | 768 bytes (+129%) | 768 bytes (+129%) |
| CPU Clock Speed | 40 MHz (10 MIPS) | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz | 40 MHz |
| Operating Temperature | -40C to +125C (Automotive -E) | -40C to +85C (Industrial) | -40C to +125C (Automotive) | -40C to +125C (Automotive) | -40C to +85C (Industrial) | -40C to +125C (Automotive) | -40C to +85C (Industrial) |
| Motor Control Kernel | Single-Phase Induction Motor (SPIM) | Single-Phase Induction Motor (SPIM) | Single-Phase Induction Motor (SPIM) | Single-Phase Induction Motor (SPIM) | 3-Phase BLDC control kernel | No dedicated motor kernel (general-purpose) | No dedicated motor kernel (general-purpose) |
| Supply Voltage | 4.2V to 5.5V | 4.2V to 5.5V | 4.2V to 5.5V | 4.2V to 5.5V | 4.2V to 5.5V | 2.0V to 5.5V (wider) | 2.0V to 5.5V (wider) |
| A/D Converter | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels | 10-bit, 8 channels |
Key Differentiators
- Integrated Single-Phase Induction Motor control kernel (vs PIC18F4420-E/PT)
- Automotive-grade -40C to +125C with same die as industrial version (vs PIC18F4439-I/PT)
- 40 MHz / 10 MIPS CPU with 36 I/O and 12 KB Flash (vs PIC18F442-I/P)
Design Notes
Place the 4.2V-5.5V supply decoupling (10 uF bulk + 0.1 uF ceramic) as close to the VDD/VSS pins (14, 15) as possible. Use a separate AVDD/AVSS ferrite-filtered supply rail for the analog reference, since the on-chip 10-bit A/D is sensitive to digital supply noise. Route the OSC1/OSC2 crystal traces symmetrically and guard them with a ground pour to minimize jitter on the 40 MHz CPU clock.
The Power Control PWM outputs (PWM1-PWM4) and the Fault inputs (FLTA, FLTB) carry fast edges with sub-microsecond rise times. Keep PWM trace lengths under 25 mm where possible and add 33 ohm series damping resistors near the MCU pin to suppress ringing on the gate-driver side. The ICSP programming pins (RB5/RB6/RB7) should be brought out to a 5-pin header so that field firmware updates are possible without board rework.
Do not enable the Single-Phase Induction Motor control kernel with a VDD below 4.2V - the analog comparators inside the SPIM block are calibrated for 5V operation. When migrating from PIC18F4420-E/PT firmware, note that the CCP/ECCP modules differ in register mapping from the Power Control PWM module and require a peripheral library migration. The automotive -40C to +125C grade of this part is NOT recommended for extended operation above +125C junction - derate to ensure thermal reliability.
Compliance Information
RoHS/REACH/lead-free status not explicitly stated in verified web data for PIC18F4439T-E/PT; refer to Microchip product page or contact factory for declaration. AEC-Q100 is not applicable (this is an industrial/automotive-grade MCU but no explicit AEC-Q100 certification is cited in retrieved data).